Analysis of PM2.5 and Meteorological data collected by Mote Ltd, 2021

PM2.5 (μ/m3) for Riwaka at Riwaka East was collected at 1 minute intervals using a Met One ES642 near-forward optical nephelometer.

Wind (speed and direction) was measured using a Gill Windsonic 60ultrasonic sensor.

Temperature data was not measured at the Site. Temperature from the Riwaka North site has been used for the analysis.

For more information on the monitoring regime refer to report Mote (2022), “Riwaka, Brooklyn and Motueka PM2.5 monitoring network May-September 2021”, dated 18 January 2022.

Site locations (Mote, 2022)

Daily Averages

The peak daily average value of 14.77 was recorded on 2021-06-03, just below the WHO 2021 guideline of 15.

Daily Comparison about 2021-06-03

Comparison of Thursday 2021-06-03 to adjacent days.

Week Day Comparison

Comparison of Thursday 2021-06-03 to all other Thursdays within the dataset.

PM2.5 vs Temperature

Windrose Plots 2021-06-03

Windrose Plot 2021-06-[1:2&4:5]